Hot rolled wire rod for high-strength cut steel wires and production method of hot rolled wire rod

Abstract

The invention discloses a hot rolled wire rod for high-strength cut steel wires and a production method of the hot rolled wire rod. The production method of the hot rolled wire rod comprises the work procedures of converter smelting, LF refining, continuous casting and steel rolling. The hot rolled wire rod comprises, by weight percentage, 0.79-0.85% of C, 0.15-0.30% of Si, 0.40-0.60% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.010% of S, smaller than or equal to 0.05% of Cr, smaller than or equal to 0.05% of Ni, smaller than or equal to 0.05% of Cu, smaller than or equal to 0.0015% of Alt, smaller than or equal to 0.0008% of Als, smaller than or equal to 0.0010% of Ti, smaller than or equal to 0.0020% of T.O, smaller than or equal to 0.0030% of N, and the balance Fe and inevitable impurity elements. The center segregation of the wire rod obtained through the method is smaller than or equal to the level 2, the grain size is smaller than the level 7, the sorbitizing rate is larger than or equal to 85%, the tensile strength ranges from 1050 MPa to 1250 MPa, the reduction of area is larger than or equal to 38%, and good drawing machining performance is achieved; inclusion has good deformation performance or fragility, the length-width ratio average value of the inclusion is larger than or equal to 6, and the maximum inclusion size is smaller than or equal to 15 microns; and the wire rod is used for a user to produce the 0.11-0.12 mm cut steel wires, and reaches the level that wire breakage is avoided when the length is 10000 km or above.

Description

technical field [0001] The invention relates to a high-carbon steel wire rod and a production method thereof, in particular to a hot-rolled wire rod for high-strength cutting steel wire and a production method thereof. Background technique [0002] Ultra-high-strength steel wire for cutting wire, referred to as cutting wire, is a high-grade galvanized copper high-carbon steel wire with a diameter of φ0.07~0.20mm. It is mainly used for cutting and forming monocrystalline silicon, polycrystalline silicon and various gemstones. Indispensable material. The production process of cutting steel wire is similar to that of steel wire for cord, but the specification range is smaller than that of steel wire for cord (φ0.15~0.38mm). Usually, the length of the cut wire is hundreds of kilometers, no solder joints are allowed, and it is shorter than the size of the wire. The length of the cutting steel wire can only be scrapped; and in the cutting process, the cutting steel wire is not al...

AI Technical Summary

Problems solved by technology

At present, domestic enterprises are still unable to fully meet the production requirements of cutting steel wire, and still rely on imports to a large extent, which also has a certain impact on the cost and industrial safety of my country's photovoltaic industry